Question

after a severe winter storm, garys driveway was covered with ice. he read that salt makes ice melt at a lower temperature. before covering his entire driveway with salt, he wanted to know if adding salt could actually help melt ice in the freezing outdoor temperatures. gary weighed twenty ice cubes. he sprinkled salt on half of the ice cubes and left the other half unsalted. he placed all the ice cubes outside. one hour later, gary quickly dried each ice cube and reweighed it to see how much it had melted. in this experiment, which were part of a control group? the unsalted ice cubes the salted ice cubes

Explanation:

Step1: Identify control group concept

In an experiment, the control group is not exposed to the variable being tested.

Step2: Determine control in ice - salt experiment

The unsalted ice cubes are not exposed to salt, so they are the control group.

Answer:

The unsalted ice cubes